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The Best Active Noise-Cancelling Headphones Worth Buying Right Now Brandt Ranj © Amazon Active noise cancellation (ANC) used to be a feature reserved for a couple of really high-end headphones, but over the past five years it’s become more and more common. The ability to block out unwanted noise so you can focus on your music during your commute, or muffle the sound of an airplane’s engines while you travel is a major improvement over cranking up your volume, which can impact your hearing over time. How Do Active Noise-Cancelling Headphones Work? It all comes down to microphones and physics. All sound can be broken down into sine waves, which have peaks and valleys based on their volume and frequencies; the sine wave of loud, low sounds will look different than one created by a soft, high pitched noise. Before active noise cancellation, headphones would attempt to block

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